EP1039739A2 - Schreibkontrollverfahren und Bilderzeugungsgerät - Google Patents

Schreibkontrollverfahren und Bilderzeugungsgerät Download PDF

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Publication number
EP1039739A2
EP1039739A2 EP00302262A EP00302262A EP1039739A2 EP 1039739 A2 EP1039739 A2 EP 1039739A2 EP 00302262 A EP00302262 A EP 00302262A EP 00302262 A EP00302262 A EP 00302262A EP 1039739 A2 EP1039739 A2 EP 1039739A2
Authority
EP
European Patent Office
Prior art keywords
writing
recording material
forming apparatus
image forming
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00302262A
Other languages
English (en)
French (fr)
Other versions
EP1039739A3 (de
EP1039739B1 (de
Inventor
Norio Joichi
Youbao Peng
Hiroyuki Watanabe
Satoshi Sakata
Makoto Ui
Fumio Haibara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Publication of EP1039739A2 publication Critical patent/EP1039739A2/de
Publication of EP1039739A3 publication Critical patent/EP1039739A3/de
Application granted granted Critical
Publication of EP1039739B1 publication Critical patent/EP1039739B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/047—Detection, control or error compensation of scanning velocity or position
    • H04N1/053—Detection, control or error compensation of scanning velocity or position in main scanning direction, e.g. synchronisation of line start or picture elements in a line
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00721—Detection of physical properties of sheet position

Definitions

  • the present invention relates to a writing control method and an image forming apparatus, and particularly to the control by which an optimum image formation can be realized corresponding to a position of a transfer sheet in the primary scanning direction.
  • Fig. 9 is a plan view showing an outline structure of an image forming apparatus such as a laser printer.
  • numeral 1 is a photoreceptor drum
  • numeral 3 is a semiconductor laser to generate the laser light corresponding to a writing signal
  • numeral 4 is a polygon mirror to conduct the deflection-scanning by using the laser light
  • numerals 10a and 10b are transfer sheets.
  • the photoreceptor drum 1 is rotated at a constant speed, and an electrostatic latent image is formed by the laser light on the surface of the photoreceptor drum 1.
  • This electrostatic latent image is developed as a toner image by a developing unit, not shown, and the toner image is transferred onto the transfer sheet by a transfer unit, also not shown.
  • positioning can be conducted by a registration roller just before the transferring.
  • the correction is conducted by oscillating a conveyance roller in the axial direction, however, the sufficient accuracy can not be obtained.
  • Japanese Patent Publication No. 2550558 an image forming apparatus in which the relative slippage of the transfer sheet to its ideal reference position is detected, and the position of the image formation is corrected corresponding to the slippage, is shown.
  • the slippage of the position of the transfer sheet is detected by a plurality of light receiving elements, the plurality of detection results from the light receiving elements are connected to a ROM, and are converted into the slippage amount in the ROM.
  • an object of the present invention is to realize a writing control method and an image forming apparatus by which, when the position of the transfer sheet is detected, the radio noise is not generated, and further, the influence of the external noise is not affected, and the image forming position is determined corresponding to the position of passage of the transfer sheet and the stable image formation can be realized.
  • the present embodiment is an embodiment of an electrostatic recording system image forming apparatus in which an electrostatic latent image formed by exposing on the photoreceptor, is developed by toner, and after the toner image is thermally fixed, an image is obtained, however, the present invention is not limited to such the apparatus, but also includes an inkjet system or a sublimation type transfer system image forming apparatus.
  • Fig. 1 is a block diagram showing an example of an electrical structure of an image forming apparatus of the embodiment of the present invention
  • Fig. 2 is a block diagram showing an example of a detailed electrical structure of a main portion of an image forming apparatus of the embodiment of the present invention
  • Fig. 3 is a sectional side view showing a mechanical structure of an image forming apparatus of the embodiment of the present invention.
  • an image reading section 20 is structured by an optical system having the light source 23, mirrors 24, 25, 26, image forming optical system 27 and CCD 28, and an optical system driving means, not shown.
  • the reading is conducted in the state that the light source 23 and the mirror 24 are fixed under the second platen glass 22.
  • the image data of the read document "d" is sent from the CCD 28 to an image processing section 120, not shown.
  • the document "d" whose obverse and reverse images are read is reversed again by the reversal roller 14, and stacked on a delivery sheet tray 16 in the state that the obverse side of the document "d" is facing downward.
  • the image data read by the image reading section 20 is subjected to a predetermined image processing in the image processing section 120, after that, compressed and stored in an image memory.
  • a transfer sheet "p” is fed from a sheet feed cassette 30 on which transfer sheet are stacked, by a conveyance roller 181, and fed to an image forming section 50. Further, from a hand feeding tray 31, the transfer sheet "p” is fed by a conveyance roller 183, and fed to the image forming section 50.
  • the transfer sheet "p” fed to the image forming section 50 is synchronized by a registration roller 185 located near the inlet of the image forming section 50, the transfer sheet "p” approaches the photoreceptor drum 51 which is a image carrier. That is, the first conveyance path from the sheet feed cassette 30 to the registration roller 185, and the second conveyance path from the hand feeding tray 3 to the registration roller 185 are provided.
  • the leading edge of the transfer sheet "p" synchronized by the registration roller 185 is detected by a leading edge detection sensor 190, and the passage position in the primary direction of the transfer sheet "p" is detected by a position detection sensor 220 structured by the contact type line sensor. Incidentally, the detection of the passage position will be further detailed later.
  • the image data is inputted from the image processing section to an image writing section 40, and the laser light corresponding to the image data is irradiated from the laser diode in the image writing section 40 onto the photoreceptor drum 51, and the electrostatic latent image is formed.
  • the electrostatic latent image By developing the electrostatic latent image by a developing section 53, the toner image is formed on the photoreceptor drum 51.
  • the toner image is transferred onto the transfer sheet "p” by a transfer section 54 located below the photoreceptor drum 51.
  • the transfer sheet “p” brought into contact with the photoreceptor drum 51 is separated by a separation section 55.
  • the transfer sheet “p” separated from the photoreceptor drum 51 enters into a fixing section 59 through a conveyance mechanism 58, and the toner image is fixed by heat and pressure. According to this, an image is formed on the transfer sheet "p".
  • the transfer sheet "p" on one side of which the toner image is fixed is conveyed to the lower side through a guide 61, and enters into a reversal section 63.
  • the transfer sheet "p" which enters into the reversal section 63 is conveyed again by the reversal roller, and sent again to the image forming section 50 through the reversal conveyance path 64.
  • the toner adhered onto the photoreceptor drum 51 is removed by a cleaning section 56, and the photoreceptor drum 51 stands by the next image formation.
  • the other side of the transfer sheet "p" (the surface on which the image is not yet formed) is conveyed to the image forming section and the image is formed.
  • the transfer sheet separated from the photoreceptor drum 51 by the separation section 55 enters again into the fixing section 59 through the conveyance mechanism 58, and is fixed. According to that, the transfer sheet "p" whose reverse and obverse image formation has been completed, or the transfer sheet "p" on whose one side surface the image formation has been completed, is delivered to the outside of the apparatus.
  • numeral 110 is a CPU as the control means for controlling each section of the image forming apparatus, and for controlling the detection of passage position of the transfer sheet "p" and the determination of writing position.
  • Numeral 120 is the image processing section to control so as to change the writing position in the primary scanning direction after receiving the information of the writing position determined by the CPU 110.
  • Numeral 130 is the writing section to write the image onto the photoreceptor drum 51 by the laser beam by receiving the processing result by the image processing section 120.
  • the processing section 100 comprising the CPU 110, image processing section 120 and writing section 130, is arranged on a main circuit board.
  • numeral 210 is a sensor driving clock generation section to generate the sensor driving clock to drive the position detection sensor, and is structured such that the drive of the position detection sensor and the measurement of the passage position of the transfer sheet are conducted by the sensor driving clock.
  • Numeral 220 is the position detection sensor structured by the contact type line sensor driven by the sensor driving clock, and is structured by an LED light source 220a serving as a light emitting section, and the line sensor 220b serving as a light receiving section. Incidentally, in the case of the contact type line sensor, the focal distance of the light emitted from the light source is very short.
  • this LED light source 220a a red LED is used, the responsibility is better, and preferable. Further, a reading sensor of a facsimile apparatus can be used as the light receiving section 220b. Incidentally, for the LED light source and the light receiving section 22b, it is not necessary that the light emitting element corresponds to the light receiving element in 1 to 1.
  • Numeral 230 is the sample hold circuit by which the output of the position detection sensor 220 is sampled and held by being in timed relationship with the sensor driving clock.
  • Numeral 240 is a comparator to compare the holding result of the sample hold circuit 230 to a predetermined value (transfer sheet detection level).
  • Numeral 250 is a counter to count the sensor driving clock when the output of the comparator 240 is in a predetermined state.
  • Numeral 260 is a serial transmission section to convert the count result of the counter 250 into the predetermined serial data, and to transfer the data in the serial communication.
  • these sensor driving clock generation circuit 210, sample hold circuit 230, counter 250, and serial transmission section 260 are arranged in the vicinity of the position detection sensor 220. Incidentally, these are collectively called an end position detection means 200.
  • numeral 320 is a driving source (driving motor) to drive the registration roller 185, and is controlled by a driving motor ON/OFF signal from the CPU 110.
  • Numeral 330 is a clutch as a transmission mechanism to transmit the rotation force of the motor 320 to the registration roller 185 according to the registration roller ON signal.
  • the leading edge detection sensor 190 and the position detection sensor 220 may be on the same side of the transfer sheet "p", or the leading edge detection sensor 190 and the position detection sensor 220 may be on both sides of the transfer sheet with the transfer sheet between them.
  • Figs. 6(a) to 6(e) are time charts showing the state of operations of the present embodiment
  • Fig. 7(a) to 7(l) are time charts which show further detailed state.
  • a drive motor ON/OFF signal is turned ON by the CPU 110 ((1) in Fig. 6(a)).
  • a registration roller ON/OFF signal is turned ON ((2) in Fig. 6(b)), and the driving force is supplied to the clutch 330. According to this, the transfer sheet "p" is start to be conveyed toward the photoreceptor drum 51.
  • the LED light source 220a is also driven to start light emission. Further, according to turning ON of this registration roller ON/OFF signal, the sensor drive clock generation section 210 generates a sensor drive clock ((3) in Fig. 6(c)).
  • the transfer sheet "p" is conveyed by the drive of the registration roller 185, and detected by the leading edge detecting sensor 190 ((4) in Fig. 6(d)).
  • the passage position of the transfer sheet in the primary scanning direction is detected as the absolute position by the position detection sensor 220 arranged at a position which is almost the same phase as the leading edge detecting sensor 190.
  • the irradiation light from the LED light source 220a is reflected on the transfer sheet "p" up to the position of the edge position in the primary scanning direction of the transfer sheet "p", and detected by the receiving section 220b.
  • the serial transmission section 260 transmits the count result of the counter 250 showing the position of the edge position of the transfer sheet "p" to the CPU 110 in the serial communication as the transfer position data.
  • the counter 250 counts the comparator output pulse ((5) in Fig. 6(e)) after a predetermined time after the leading edge detecting sensor 190 detects the transfer sheet "p".
  • the CPU 110 received this transfer position data, gives the instruction data to shift the image in the primary scanning direction, to the image processing section 120.
  • the image processing section 120 shifts the image data in the primary scanning direction by a necessary amount, and supplies the image data to the writing section 130.
  • a reference position adjustment value is a value to adjust the relative position slippage between the position of the light receiving portion of the most edge position of the position detecting sensor and position of the laser scanning start position sensor (refer to Fig. 5). That is, when each sensor is attached with the high accuracy, and the above relative position slippage is not caused, the reference position adjustment value is set to zero, however, when the relative position slippage is caused at the time of attachment of each sensor, the reference position adjustment value is set corresponding to the slippage value.
  • the stable image formation can be conducted by the determination of the writing position, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the passage position of the transfer sheet "p" in the primary scanning direction is detected as the absolute position by the position detection sensor 220 structured by the contact type line sensor, and according to the detection result, the writing position is determined, thereby, the stable image formation can be conducted by the determination of the more accurate writing position than the conventional one, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the passage position of the transfer sheet "p" in the primary scanning direction is detected as the absolute position by the position detection sensor 220 structured by the clock operation type contact line sensor, and according to the detection result, the writing position is determined, thereby, the stable image formation can be conducted by the determination of the accurate writing position by counting the clock, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the position detection sensor 220 is arranged on the downstream side of the registration roller 185, the sheet skew is corrected, and the accurate writing position can be determined corresponding to the final passage position of the transfer sheet "p", thereby, the accurate and stable image formation can be carried out.
  • the passage position of the transfer sheet "p" can be detected without uselessness, and the accurate writing position can be determined, thereby, the accurate and stable image formation can be carried out.
  • the lighting of the LED light source 220a of the contact type line sensor is driven by using the clock made to be outputted during the driving of the registration roller 185, the unnecessary clock is not generated, thereby, the stable image formation can be carried out.
  • the contact type line sensor having a range at least to cover one end of the maximum sized transfer sheet "p" and one end of the minimum sized transfer sheet "p", is used (refer to Fig. 4 and Fig. 5), the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the contact type line sensor may be arranged corresponding to the maximum presupposition amount of the passage position. Incidentally, in the example shown in Fig. 5, X is corresponding to the transfer position data.
  • the passage position of the transfer sheet "p" is detected at a predetermined timing after the leading edge of the transfer sheet "p” is detected, the position in the state that the transfer sheet "p” actually passes, can be accurately detected, thereby, the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet "p” or the size of the transfer sheet "p".
  • the sensor output is sampled and held, and compared to a predetermined value, and the sheet end position of the transfer sheet is detected, the position in the state that the transfer sheet "p" actually passes, can be accurately detected, thereby, the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the position in the state that the transfer sheet "p" actually passes can be accurately detected, thereby, the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet "p" or the size of the transfer sheet "p".
  • the counter 250 to detect the passage position of the transfer sheet "p" is arranged in the vicinity of the position detection sensor 220, the wiring which has a possibility of generating noises, is greatly shortened. Because the output of the comparator 240 which is the detection result, is transferred in the serial communication, data can be transferred even when the number of wiring is small, and in the portion in which the wiring becomes long, a possibility of generating noises can be reduced.
  • the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet "p” or the size of the transfer sheet "p".
  • the writing position is determined by defining the position of the edge position of the recording material in the primary scanning direction, detected by the position detection sensor, as the absolute position, and the control is conducted so that the writing is started by the writing apparatus, thereby, the stable image formation can be carried out by the determination of the accurate writing position, without depending on the passage position of the transfer sheet or the size of the transfer sheet.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Laser Beam Printer (AREA)
  • Ink Jet (AREA)
EP00302262A 1999-03-23 2000-03-20 Schreibkontrollverfahren und Bilderzeugungsgerät Expired - Lifetime EP1039739B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7772899 1999-03-23
JP7772899 1999-03-23

Publications (3)

Publication Number Publication Date
EP1039739A2 true EP1039739A2 (de) 2000-09-27
EP1039739A3 EP1039739A3 (de) 2002-10-23
EP1039739B1 EP1039739B1 (de) 2007-05-09

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EP00302262A Expired - Lifetime EP1039739B1 (de) 1999-03-23 2000-03-20 Schreibkontrollverfahren und Bilderzeugungsgerät

Country Status (3)

Country Link
US (1) US6342909B1 (de)
EP (1) EP1039739B1 (de)
DE (1) DE60034727T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003067339A1 (en) * 2002-02-06 2003-08-14 Canon Kabushiki Kaisha Image forming apparatus and image formation control method

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6862375B1 (en) * 2000-10-04 2005-03-01 Hewlett-Packard Development Company, L.P. Skew compensation for raster image transfer device
US6641134B1 (en) * 2000-10-27 2003-11-04 Heidelberger Druckmaschinen Ag System and method for improved registration performance
US6511239B1 (en) * 2000-11-17 2003-01-28 Xerox Corporation Flyer determination and elimination for side edge electronic registration
JP3728216B2 (ja) * 2001-04-12 2005-12-21 キヤノン株式会社 画像形成装置
US6539199B1 (en) * 2001-10-10 2003-03-25 Toshiba Tec Kabushiki Kaisha Image forming device and method capable of correcting lateral misalignment
JP2007139756A (ja) * 2005-10-17 2007-06-07 Ricoh Co Ltd 相対位置検出装置、回転体走行検出装置及び画像形成装置
JP4930692B2 (ja) * 2006-06-22 2012-05-16 コニカミノルタビジネステクノロジーズ株式会社 画像形成装置
JP5153907B2 (ja) 2010-06-30 2013-02-27 キヤノン株式会社 シート搬送装置及び画像形成装置
JP5191528B2 (ja) * 2010-12-03 2013-05-08 シャープ株式会社 画像形成装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0300096A1 (de) * 1987-07-20 1989-01-25 Agfa-Gevaert N.V. Elektrophotographischer Drucker mit seitlicher Ausrichtung des Bildes
US4965597A (en) * 1986-08-21 1990-10-23 Matsushita Graphic Communication Systems, Inc. Color image recording apparatus
JPH0733286A (ja) * 1993-07-22 1995-02-03 Konica Corp 画像形成装置の転写ズレ補正装置
WO1995013678A1 (de) * 1993-11-12 1995-05-18 Siemens Nixdorf Informationssysteme Ag Vorrichtung und verfahren zur exakten positionierung eines druckbildes auf einem aufzeichnungsträger
JPH10186951A (ja) * 1996-12-26 1998-07-14 Canon Inc 画像形成装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712118A (en) * 1985-08-26 1987-12-08 Canon Kabushiki Kaisha Laser beam printer
US5140340A (en) * 1991-01-30 1992-08-18 Eastman Kodak Company Apparatus and method for printing of images with compensation for dislocation of printing media
US6137989A (en) * 1998-04-15 2000-10-24 Xerox Corporation Sensor array and method to correct top edge misregistration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965597A (en) * 1986-08-21 1990-10-23 Matsushita Graphic Communication Systems, Inc. Color image recording apparatus
EP0300096A1 (de) * 1987-07-20 1989-01-25 Agfa-Gevaert N.V. Elektrophotographischer Drucker mit seitlicher Ausrichtung des Bildes
JPH0733286A (ja) * 1993-07-22 1995-02-03 Konica Corp 画像形成装置の転写ズレ補正装置
WO1995013678A1 (de) * 1993-11-12 1995-05-18 Siemens Nixdorf Informationssysteme Ag Vorrichtung und verfahren zur exakten positionierung eines druckbildes auf einem aufzeichnungsträger
JPH10186951A (ja) * 1996-12-26 1998-07-14 Canon Inc 画像形成装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BUTTS R E ET AL: "REGISTRATION OF ELECTRONIC IMAGE TO COPY MEDIA" XEROX DISCLOSURE JOURNAL, XEROX CORPORATION. STAMFORD, CONN, US, vol. 19, no. 6, 1 November 1994 (1994-11-01), pages 461-464, XP000484360 *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 05, 30 June 1995 (1995-06-30) & JP 07 033286 A (KONICA CORP), 3 February 1995 (1995-02-03) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 12, 31 October 1998 (1998-10-31) & JP 10 186951 A (CANON INC), 14 July 1998 (1998-07-14) & US 6 052 552 A (OHNO AKIO ET AL) 18 April 2000 (2000-04-18) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003067339A1 (en) * 2002-02-06 2003-08-14 Canon Kabushiki Kaisha Image forming apparatus and image formation control method
US6934504B2 (en) 2002-02-06 2005-08-23 Canon Kabushiki Kaisha Image forming apparatus and image formation control method
US7016642B2 (en) 2002-02-06 2006-03-21 Canon Kabushiki Kaisha Image forming apparatus and image formation control method

Also Published As

Publication number Publication date
EP1039739A3 (de) 2002-10-23
EP1039739B1 (de) 2007-05-09
DE60034727T2 (de) 2008-01-17
DE60034727D1 (de) 2007-06-21
US6342909B1 (en) 2002-01-29

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